The present invention provides a kind of patients sucking/calling device, such as spirometer, type of respiration inhalator or spacer, and described device includes: at least one hole for admitting air into described device and/or air being discharged from described device The bite being connected to for the oral area with patient And body portion, it is limited to the inlet air flow path extended between the aperture and the bite, air is inhaled into the bite or air along the inlet air flow path by the air-breathing of patient and is pressed towards the hole by the expiration of patient. The body portion includes air flow rate indicator, the air flow rate indicator be operable as generating to indicate along the inlet air flow path air flow rate when at or greater than predetermined minimum level voice signal. On the other hand, the present invention provides a kind of device for being used to indicate the desired fluid flow rate along the fluid flow path for passing through type of respiration inhalator. Described device includes: entry pore Exit aperture for being in fluid communication with the fluid flow path for passing through type of respiration inhalator And body portion, it is limited to the second fluid flowing path extended between the entry pore and the exit aperture. The body portion includes: the connector part for being connected to the type of respiration inhalator And fluid flow rate indicator, it is operable as generating to indicate when the fluid flow rate for flowing path along the second fluid is in the voice signal of predetermined fluid flow rate. The air flow rate indicator includes corrugated portion, and the corrugated portion has at least one or more ripple extended in its fluid flow path.
